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GMC Caballero 5.0L 1985, Alternator Nose by CFR Performance®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship.. May 20, 2012 · #2 wire on GM--> post on GM alternator New 4ga B wire from post on alternator to inline fuse (~120A for 105A alternator) to positive terminal on battery. Add a 6ga wire from positive terminal on battery to post that the stock B wire connected to in fuse box (protected by stock 80A fuse to power regular OEM accessories).. GM usually wired this small red wire to the battery cable connection on the starter, but most hot rodders just connect it to the output of the alternator (the screw terminal that the big red wire connects to). Simplified Alternator wiring. March 23rd, 2014, 12:29 PM..